Door lock



NOV. 23, 1937. s BUBES 2,100,237

DOOR LOCK Filed March l5, 1937 .1.. l lil llnhl 'l i l I l 1 I .J

a. mi

Patented Nov. 23, 1937 UNITI-:D STATES PATENT OFFICE 6 Claims.

'I'his invention relates to door latches.V Children riding in automobiles have atendencyztopoperate the inside door handle and occasionally release the lat'ching bolt of the usual lock ancll arethrown out of the automobile and in some instances are thus killed or seriously in-v lured, Furthermore, unauthorized persons linding'rtheggdoor locked and unable to manipulate the outside. door -;hand1e forreleasins .the 1151131 locking, boltv will inserta Wire r other instrument throughropenings for engagement with the innerf door handle for releasing the door for entry to the automobile. Y o I l It is anobject of the ,present invention to provide a door latchY whereby the inner door `handie may be released from operative engagement with: the locking mechanism so` that when any attempt is made to open Vthe door from the linvside bysome `unauthorized persorrthe handle may beY merely rocked without effecting the releasing of the locking bolt. .Y Y Y. .Another object of the invention the; provision-of a simple andre'icient device for connecting, `o'r disconnecting the inner door handle from, the Y,usual locking mechanism or" an automobile door so that unauthorized persons Ywho attempt togmanipulate the inner door handle will iindJthat saiddoor handle is inoperative for releasingthe lockingbolt. Y

A further object of the'invention is Vthe provision lof a door latch particularly useful in connection with automobiles in which a springpressed sleeve normally disconnects the inner doorkhandle from the usual locking mechanism for the door, means being provided for moving l the'sleeve to an operative connecting position betweenthe inner door handle and the locking mechanism. so that the door may be unlocked from theV inside; Y Y A still further object of the invention is the provision of 'a door latch which may be employed inconnection with the inner or outer'handles which manipulate theD locking bolt of a door whereby either or both of the handles may be released from operative engagement with the locking mechanism to prevent unauthorized personsfrom .manipulating the usual locking bolt for opening the door. o

This invention'will be best ,understood from a consideration of the following detailed description, inA View of the accompanying'drawing` forming' a part of the specication; nevertheless, it

'is to' be understood that the invention is not confined' to the disclosure, being susceptible of such changes and modications as dene no material departure from the salient features of the invention as expressed in the appended claims.

Figure 1 is a fragmentary view in perspective of a section of an automobile door showing my improved door latch applied thereto,

Figure 2 is a longitudinal vertical section taken along the line 2--2 of Figure 1 showing the position of the parts for unlocking the door by an inside handle, l0

Figure 3 is a section similar to that shown in Figure 2 in which the inner door handle has been released from operative engagement with the locking mechanismof the door,

Figure 4 is a vertical section taken along the l5 line 4-4 of Figure 2,

Figure 5 is a verticalsection taken along the line 5-5 of Figure 2, A o

Figure 6 is a transverse vertical section taken along the line 6-6 of Figure 2, 20

Figure 'l is a transverse vertical section taken along the line 'I-'I `of Figure 2, and

Figure 8 is a transverse VerticalY section taken along the line 8-8 of Figure l2. 1

Referring more particularly to the drawing it will be seen that the door latch is applied to an automobile door but it must Ybe borne in mind that a similar'latch may be employed in connection with the outer door handle for releasing the same if desired by a mere extension of certain'ofthe parts of the construction. This type of construction just mentioned may also be employed in connection with buildings Where it is desired to release the handle or door knobat the exterior of the building to prevent unauthorized persons from manipulating the handle o1' knob as desired. o l

The mechanism is housed within a casing Ill which is mounted in the door and securedtherein in any approved manner against turning. This 4 casing is inmthe form of a hollow cylinder and has an open end II through which is adapted to be inserted a shank I2. This shank or operating bar is lsecured to a lever I3 and a link I4 connects theA lever with the usual operating elements of the door lock for releasing said lock when desired.` The member I2 is square-shaped in cross section and is adapted to neatly t within a sleeve or rotatable member I5 so that when the member I5 is rocked the shank I2 will also 50 be rocked. While the interior of the sleeve I5 and the member I 2 is described as being rectangular in cross section these parts may have any suitable non-circular configuration. The only requirement is that the member I2 will have co- 55 operating faces which will engage complementary faces within the sleeve I5. I

The sleeve I5 is received by a bearing IB having an outer circular contour which is received within the cylinder II and the bearing I6 is adapted to rotate with the member I5.

An auxiliary sleeve 20 has the same exterior contour as the inner surface of the sleeve I5 and the auxiliary sleeve is secured to the sleeve I5 or it may be formed integrally therewith so that the auxiliary sleeve and the main sleeve I5 will be rotated simultaneously.

A shaft 2I is mounted for rotation in the auxiliary sleeve 20 which forms a bearing for the shaft 2I. A washer 22 engages the outer end of the shaft 2| and the auxiliary sleeve 20 and any suitable means 23 is provided for maintaining the Washer 22 in position.

Intermediate its ends the shaft is provided with a nut portion 25 which is square-shaped, as shown more particularly in Fig. 5. This nut forms a shoulder which abuts the inner end of the auxiliary sleeve 20. Thus the shaft 2I will be maintained in position within the sleeve 20 and against sliding movement.

The extreme inner end of the shaft 2 I, as shown at 30, is received within a socket 3I of a shank portion 32 for an inner door handle 33. The shank portion is secured to the inner end 30 of the shaft 2I and has its inner end, as shown at 34, abutting a washer 35. This washer is located between the nut portion 25 and the inner end of the shank portion 32 and is rigidly fastened to the casing I 0. The members 25, 32 and 35 are secured together so that oscillation of the handle 33 will cause rocking of the shaft 2 I.

A sleeve 40 has a central passage 4I which is rectangular in shape and is slidably mounted upon the inner end of the auxiliary sleeve 20. The sleeve is also adapted to slide over the nut portion 25, as shown in Fig. 2, for locking the shaft 2i to the'auxiliary sleeve 2U and likewise to the main sleeve I5. Y

The locking sleeve 40 is provided with a reduced portion 42 to provide a pocket 43 for one end of a coil spring 44. One end of the spring is seated against an annular shoulder 46 on the locking sleeve 40 while the opposite end of the spring engages the washer 35.

The casing IIJ is provided with an arcuatelyshaped slot 50 extending at least 90 around the periphery of the said casing. Extending at right angles from the curved slot 50 is a horizontal slot 5I.

A set screw 52 is threaded into an opening 53 in the locking sleeve 40 and has a manipulating knob 54 located exteriorly of the casing I0. It will be noted that the screw passes through the horizontal slot 5I and into the opening 53.

The operation ofmy device is as follows: As shown in Fig. 3 the sleeve 40 is retained in itsirinermost position by the spring 45'with the inner edge of the sleeve abutting the inner end, 55 of the main sleeve I5 and the bushing orbearingY I 6. At this time the set screw 52 is located in the horizontal slot 5I and the handle 33 may be operated without causing rocking of the sleeve l5.

When the sleeve I5 is in the position shown in Fig. 3 it is out of engagement with the nut or squared portion 25 of the shaft 2I. Thus it will be seen that rocking of rthe handle 33 will merely cause rocking of the member 25 and the shaft 2| in the bearing or auxiliary sleeve 20.

When it is desired toconnect the handle 33 to the rocking or rotatable member I5 the sleeve 40 is moved outwardly against the tension of the spring 45 by means of the knob 54 of the set screw 52 whereby the squared interior socket portion of the locking sleeve 40 will receive the nut or enlargement 25 whence the members I5 and 2I will be connected for simultaneous rotation. The set screw 52 is then in the arcuate slot 5I] and when screwed inwardly will engage the auxiliary sleeve 20 and secure the locking sleeve 4U against inward movement. In other words the sleeve 40 will be held against reciprocation by the spring 45.

When the parts are in the position shown in Fig. 3 the handle 33 may be rocked, and since the locking sleeve 4D connects the auxiliary sleeve 20 and likewise the main sleeve I5 with the shaft 2 I, said handle will also rock the rotatable member I5 and likewise the member I2 for releasing the usual locking bolt of the door lock.

While I have illustrated the door latch as applied to an automobile door it will be appreciated that this construction may be applied to the door handles of buildings and with a slight change in the position of the set screw 52 it may connect or disconnect the outside handle of the door from the inside where such constructions are desired.

I claim:

1. In a door latch, a casing, a rotatable member adapted to be connected to an operating part of a door lock and mounted in said casing, a shaft loosely mounted for rotation inthe ro' tatable member, a door handle connected to the outer end of the shaft, a sleeve slidably mounted on the member and rotated by said( member, cooperating means on the shaft and sleeve for operatively connecting the rotatable member with the shaft, a spring for maintaining the sleeve out of engaging relation with the connecting means on the shaft, and means for retaining the sleeve in engagement with said connecting means so that the handle may operate the rotatable member. y

2. In a door latch, a rotatable means adapted to be connected to an operating'part of a door lock, a shaft,` a door handle for rocking said means and connected to the shaft, means adapted to connect the shaft with the rotatable means, a spring for retaining the connecting means in an inoperative position, and means for securing the connecting means in an operative position against the tension of the spring.

3. In a door latch, a rotatable means adapted to be connected to an operating Apart of a door lock, a casing housing said means, a shaft mount--` ed for independent rotation in the rotatable means and having a locking shoulder, a slidable sleeve operatively connected with the'rotatable means and adapted to be moved into vengagement with the locking shoulder for connecting the shaft with the rotatable means, an inner door handle connected to the shaft, a spring for retaining the sleeve in an inoperative position, and means for maintaining the sleeve in an'operative locking position against the tension of the spring.

4. In a door latch, a rotatable means adapted to be connected to an operating part of a door lock, a casing housing said means, a shaft mounted for independent rotation in the rotatable means and having a locking shoulder, a slidable sleeve operatively connectedf with the rotatable means and adapted to be moved into engagement with the locking shoulder for connecting the shaft with the rotatable means, an inner door handle connected to the shaft, a spring for retaining the sleeve in an inoperative position, 75

the casing having an arcuate slot and a straight slot atan angle to the arcuate slot, a set screw carried by the sleeve for locking the sleeve to the rotatable means and movable in the arcuate slot, said screw being disposed in the straight slot when the sleeve is in an inoperative locking position.

5. In a door latch, a rotatable means adapted to be connected to an operating part of a door lock, a casing housing said means, a shaft mounted for independent rotation in the rotatable means and having a locking shoulder, a slidable sleeve operatively connected with the rotatable means and adapted to be moved into engagement with the locking shoulder for connecting the shaft with the rotatable means, an inner door handle connected to the shaft, a spring for retaining the sleeve in an inoperative position, the casing having an opening in the side wall thereof, a s'et screw carried by the sl'eev'e` and projecting through the opening, said screw adapted to secure the sleeve to the rotatable means when said sleeve is in connecting relation between the shaft and rotatable means against the tension of the spring.

6. In a door latch, a casing, a rotatable means adapted to be connected to an operating part of a door lock and rockably mounted in the casing, a shaft rotatably mounted in the rotatable means, a door handle connected to the shaft, means releasably connecting the shaft with the rotatable means and including a slidable sleeve and a set screw for securing the sleeve against movement on the rotatable means, and cooperating means on the shaft, sleeve and rotatable means for operatively connecting the shaft to said rotatable means.

SIMON BUBES. 

